1// RUN: %clangxx %s -o %t && %run %t %p
2
3#include <assert.h>
4#include <resolv.h>
5#include <string.h>
6
7#include "sanitizer_common/sanitizer_specific.h"
8
9void testWrite() {
10 char unsigned input[] = {0xff, 0xc5, 0xf7, 0xff, 0x00, 0x00, 0xff, 0x0a, 0x00,
11 0x00, 0x00, 0x01, 0x00, 0x00, 0x02, 0x00, 0x01, 0x00,
12 0x10, 0x01, 0x05, 0x00, 0x01, 0x0a, 0x67, 0x6f, 0x6f,
13 0x67, 0x6c, 0x65, 0x2e, 0x63, 0x6f, 0x6d, 0x00};
14 char output[1024];
15
16 int res = dn_expand(input, input + sizeof(input), input + 23, output,
17 sizeof(output));
18
19 assert(res == 12);
20 assert(strcmp(output, "google\\.com") == 0);
21 check_mem_is_good(output, strlen(s: output) + 1);
22}
23
24void testWriteZeroLength() {
25 char unsigned input[] = {
26 0xff, 0xc5, 0xf7, 0xff, 0x00, 0x00, 0xff, 0x0a, 0x00, 0x00, 0x00, 0x01,
27 0x00, 0x00, 0x02, 0x00, 0x01, 0x00, 0x10, 0x01, 0x05, 0x00, 0x01, 0x00,
28 };
29 char output[1024];
30
31 int res = dn_expand(input, input + sizeof(input), input + 23, output,
32 sizeof(output));
33
34 assert(res == 1);
35 assert(strcmp(output, "") == 0);
36 check_mem_is_good(output, strlen(s: output) + 1);
37}
38
39void testComp() {
40 char unsigned msg[1024];
41 char unsigned *mb = msg;
42 char unsigned *me = msg + sizeof(msg);
43 char unsigned **pb = (char unsigned **)mb;
44 pb[0] = msg;
45 pb[1] = nullptr;
46 mb += 64;
47 char unsigned **pe = (char unsigned **)mb;
48
49 char unsigned *n1 = mb;
50 int res = dn_comp("llvm.org", mb, me - mb, pb, pe);
51 assert(res == 10);
52 check_mem_is_good(mb, res);
53 // pb is [msg, llvm.org, nullptr]
54 check_mem_is_good(pb, sizeof(*pb) * 3);
55 mb += res;
56
57 char unsigned *n2 = mb;
58 res = dn_comp("lab.llvm.org", mb, me - mb, pb, pe);
59 assert(res == 6);
60 check_mem_is_good(mb, res);
61 // pb is [msg, llvm.org, lab.llvm.org, nullptr]
62 check_mem_is_good(pb, sizeof(*pb) * 4);
63 mb += res;
64
65 {
66 char output[1024];
67 res = dn_expand(msg, msg + sizeof(msg), n1, output, sizeof(output));
68
69 fprintf(stderr, format: "%d\n", res);
70 assert(res == 10);
71 assert(strcmp(output, "llvm.org") == 0);
72 check_mem_is_good(output, strlen(s: output) + 1);
73 }
74
75 {
76 char output[1024];
77 res = dn_expand(msg, msg + sizeof(msg), n2, output, sizeof(output));
78
79 assert(res == 6);
80 assert(strcmp(output, "lab.llvm.org") == 0);
81 check_mem_is_good(output, strlen(s: output) + 1);
82 }
83}
84
85int main(int iArgc, const char *szArgv[]) {
86 testWrite();
87 testWriteZeroLength();
88 testComp();
89
90 return 0;
91}
92

source code of compiler-rt/test/sanitizer_common/TestCases/Linux/dn_expand.cpp